- AskScience AMA Series: We're from the Pacific Northwest National Laboratory and we research the blue economy: the sustainable use of the ocean and connected waterways for collective economic, social, and environmental benefits. Ask Us Anything!
- Can asymptomatic mean the body isn’t fighting an infection?
- How is it not possible to transfer information faster than the speed of light by use of shadows?
- If we build a very long object (let's say 1 ly) and use an infinite force to push it one meter away from a stationary point, how long will it take for the whole object to have moved one meter away? How fast do the "pushing force" travels and do the object coils like a spring while it does?
- When free falling, is terminal velocity the default velocity our body will try to accelerate/decelerate to?
- Ask Anything Wednesday - Economics, Political Science, Linguistics, Anthropology
- With the sun entering a solar minimum, could this slow the effects of climate change in terms of warming the planet?
- I've heard that humans share 50% of our DNA with bananas. What living organism on Earth shares the LEAST amount of human DNA?
- How exactly did we make the sudden jump from living in caves and hunting Mammoths to farming /living in homes? What caused us to learn agriculture? How did we enter the Neolithic era so quickly?
- For societies where occupational surnames are common, can any differences be seen in populations descended from different professions?
- Do colliders UCC as the LHC have to take into account the rotation of the earth and the differing latitude?
- How did COVID-19 spread from humans to animals?
- Why do myocytes reach +30mV in phase 0 of the action potential (AP) in both normal physiologic environments AND hyperkalemic environment? Shouldn't the hyperkalemic environment AP be lower?
- Can dolphins yawn? A study showed elephants and social animals can yawn.
- How do scientists “acquire” the virus when using a small part of it to make a vaccination?
- How do mutations happen and are they always good?
- On a molecular level, how do adhesives like glue and tape function?
- Why are COVID-19 cases (new daily confirmed cases) on the decline in so many countries?
- Do helicopters get electrically charged while flying?
- Is it possible to trace our elemental origins to a specific star explosion?
| Posted: 20 May 2020 04:00 AM PDT Within the next decade, the blue economy could generate $3 trillion in revenue for the global economy. At PNNL, we are applying our marine research and unique facilities to accelerate growth in the blue economy and are finding opportunities for innovative energy technologies such as wave, tidal, and offshore wind energy. Coastal scientists at the Marine Sciences Laboratory (MSL) in Sequim, Washington have expertise in key marine development areas, including marine renewable energy, environmental monitoring, biofuels from sustainable feedstocks, and hydrogen fuel production from the ocean. We're excited to share how science and technology are advancing the future of the blue economy. We'll meet you back here at noon PST (3 ET, 19 UT) to answer your questions! Username: PNNL [link] [comments]  |
| Can asymptomatic mean the body isn’t fighting an infection? Posted: 20 May 2020 04:38 AM PDT If something infects the body but doesn't negatively impact the host, can the host carry the infection indefinitely? [link] [comments]  |
| How is it not possible to transfer information faster than the speed of light by use of shadows? Posted: 20 May 2020 06:07 AM PDT Let's say we point a very powerful flashlight at the moon, and at both sides of the moon is an observer, and both observers see the light from earth. If we then shut off the flashlight from earth, both observers should see the light turn off at the same time (not factoring the curvature of the moon). This way, both observers know that the light must be off for the other observer as well - faster than light could travel between the observers. How does this not break the law? [link] [comments]  |
| Posted: 20 May 2020 04:20 AM PDT |
| Posted: 19 May 2020 11:27 PM PDT For example, if I was dropped out of a plane and my starting velocity is higher than my terminal velocity would I eventually decelerate to terminal velocity? [link] [comments]  |
| Ask Anything Wednesday - Economics, Political Science, Linguistics, Anthropology Posted: 20 May 2020 08:09 AM PDT Welcome to our weekly feature, Ask Anything Wednesday - this week we are focusing on Economics, Political Science, Linguistics, Anthropology Do you have a question within these topics you weren't sure was worth submitting? Is something a bit too speculative for a typical /r/AskScience post? No question is too big or small for AAW. In this thread you can ask any science-related question! Things like: "What would happen if...", "How will the future...", "If all the rules for 'X' were different...", "Why does my...". Asking Questions: Please post your question as a top-level response to this, and our team of panellists will be here to answer and discuss your questions. The other topic areas will appear in future Ask Anything Wednesdays, so if you have other questions not covered by this weeks theme please either hold on to it until those topics come around, or go and post over in our sister subreddit /r/AskScienceDiscussion , where every day is Ask Anything Wednesday! Off-theme questions in this post will be removed to try and keep the thread a manageable size for both our readers and panellists. Answering Questions: Please only answer a posted question if you are an expert in the field. The full guidelines for posting responses in AskScience can be found here. In short, this is a moderated subreddit, and responses which do not meet our quality guidelines will be removed. Remember, peer reviewed sources are always appreciated, and anecdotes are absolutely not appropriate. In general if your answer begins with 'I think', or 'I've heard', then it's not suitable for /r/AskScience. If you would like to become a member of the AskScience panel, please refer to the information provided here. Past AskAnythingWednesday posts can be found here. Ask away! [link] [comments]  |
| Posted: 20 May 2020 06:48 AM PDT I've been seeing a lot of articles about the sun entering it's solar minimum phase from relatively reliable news sources. It got me thinking... Would the solar minimum cool the planet giving humanity a better shot at fixing climate change or am I completely wrong in that thought? [link] [comments]  |
| Posted: 19 May 2020 03:35 PM PDT |
| Posted: 19 May 2020 05:10 PM PDT |
| Posted: 19 May 2020 05:04 PM PDT Assuming you could control for socioeconomic status, race, etc, would it still be possible to trace certain traits back to that ancestry? [link] [comments]  |
| Posted: 19 May 2020 02:18 PM PDT Edit: UCC was meant to be such How do calculations and engineering take into account that, because of the size of the collider, some parts of it will be spinning faster than others because of their differing latitudes? Would the collisions be at the same speed if they occurred at higher or lower latitudes eg the 'top' or 'bottom' of the LHC? Just in general what (if any) affect does the rotation of the earth have on particle accelerators? For a straight accelerator, does its direction have to be due east/west? Thanks [link] [comments]  |
| How did COVID-19 spread from humans to animals? Posted: 20 May 2020 03:39 AM PDT Sorry if this is a dumb question, but given that it is an extremely rare chance for the virus to spread to different species (as it did to us to get it), why are we seeing it commonly pass from us to other species such as tigers, cats and dogs who have recently tested positive for the virus? [link] [comments]  |
| Posted: 19 May 2020 06:49 PM PDT Hi everyone, I have a question that came up while researching inactivation gates on Na+ channels. From reading Goldin (2003) "Mechanisms of sodium channel inactivation," it seems that some Na+ channels have a time-dependent inactivation channel that closes during the depolarization phase of an action potential. My question specifically pertains to the mechanics of these inactivation gates during a state of extracellular hyperkalemia. In this paper: https://www.ncbi.nlm.nih.gov/pmc/articles/PMC1413606/, on figure 3 we see an overlaid cardiac action potential of a normal potential and one that occurs in hyperkalemia. I understand from the GHK equation that hyperkalemia would cause an elevation in cell resting membrane potential, but what I am having trouble understanding is why the peak reached by both actions potentials are the same, to ~+30mV. The authors state that "The membrane potential at the onset of depolarization determines the number of sodium channels activated during depolarization, which in turn determines the magnitude of the inward sodium current and the Vmax of the action potential. " Linking this with my understanding of the inactivation gates, I understand this statement to mean that in a higher than normal cell resting potential environment, less Na channels are able to participate in an action potential due to failure to "reset" the inactivation gate, which is directly dependent on cell repolarization. If there are less Na channels participating in phase 0 of the action potential and if inactivation gates are time-dependent, why then, do both phase 0s reach +30mV? Shouldn't the hyperkalemia AP be lower than +30mV because less total Na+ influx would have been achieved before inactivation gates closed due to less Na channel participation? [link] [comments]  |
| Can dolphins yawn? A study showed elephants and social animals can yawn. Posted: 19 May 2020 11:41 PM PDT I was reading how elephants and social animals can yawn and wondered about dolphins. [link] [comments]  |
| How do scientists “acquire” the virus when using a small part of it to make a vaccination? Posted: 19 May 2020 08:06 PM PDT |
| How do mutations happen and are they always good? Posted: 19 May 2020 11:28 AM PDT |
| On a molecular level, how do adhesives like glue and tape function? Posted: 19 May 2020 09:52 AM PDT From the way they interact with things, it seems like it can't be a chemical bond, so what is the driving mechanism? And what makes some adhesives stronger than others, like how gorilla tape far outperforms scotch tape? [link] [comments]  |
| Why are COVID-19 cases (new daily confirmed cases) on the decline in so many countries? Posted: 19 May 2020 07:56 AM PDT I see a general and long-term decline in new case data around the world. France, Italy, Spain, Singapore, and now the U.S./Canada seem to be on that path too. (Source 1) This decline has been to my surprise, because some countries have been reopening their economies. I expected the daily case rate to go up. My confusion is around: 1) Serology data only point to maybe 10% of the population tested positive for COVID-19. (Source 2) This should mean we have a long way to go before herd immunity, right? 2) Is there any possibility the virus is "fizzling out" via mutation? 3) Are there any other reasons its spread is so low that countries like Singapore and South Korea report so few cases? 4) In 1918, we saw cases decline significantly between the first and second wave. Do we know the exact reasons why that occurred? John Barry (author of The Great Influenza) mentioned that there were still pockets of outbreaks between the waves, which kind of hinted at the potential of another rebound at the national level. Do we know why the second wave was so much more worse, and do we have any information regarding the likelihood of the same thing occurring again? Source 1: https://www.worldometers.info/coronavirus/ (Select the individual country and scroll to their new case data) Source 2: https://www.cdc.gov/coronavirus/2019-ncov/covid-data/covidview/index.html [link] [comments]  |
| Do helicopters get electrically charged while flying? Posted: 19 May 2020 06:12 AM PDT When i was kid in 80s, i used to go to nearby airfield and watch parachute jumpers. I noticed that helicopters, that they used had piece of chain on the one of the chassis. And when i asked mt dad about it, he told me that while helicopter is in the air, it gets charged by static electricity from friction of blades over air. And if i would grab the chain, before it touched the ground, i would get zapped. Now watching videos of non military helicopters, with rubber tires, i dont see them having any way of being grounded during landing. So i wonder if that story was something my dad came up with, or do helicopter have that problem. And if they do have that problem how do they deal with it now? [link] [comments]  |
| Is it possible to trace our elemental origins to a specific star explosion? Posted: 19 May 2020 09:37 AM PDT So based on my understanding of the universe, the elements for life are created within stars and later spread across the universe from the exploding death of the star. Is it or will it ever be possible (that we know of) to trace the origins of elemental life on earth to a specific star location or event? Will we ever be able look at elements or particles and see where or when they came from? [link] [comments]  |
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